Fig. 5: Methods for inhibiting the ion migration in PSCs.
From: Degradation pathways in perovskite solar cells and how to meet international standards
a Incorporation of NaF into the perovskite units to form strong bonds with both cations and anions to immobilize ions at GBs. Adapted with the permission from ref. 78 Copyright © 2019, The Author(s), under exclusive licence to Springer Nature Limited b Photoluminescence images of control film and BMIMBF4-containing film under a constant applied bias (10 V). The bright areas represent photoluminescence emission from the perovskite films. The ionic liquid additive BMIMBF4 exhibits effectiveness to suppress the ion migration in halide perovskite. Adapted with the permission from ref. 90 Copyright © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
